Navbar Modification?

[Bacon Butty]

Hi, I intend to create a lot more pages on my forum soon and am looking for ways to fit extra links into the navbar comfortably (without loads of drop down menus).

To be blunt, I just want to add links underneath the current navbar links, while keeping them looking tidy and correctly aligned (ideally columned like this

from www.msn.com )

Any help would be greatly appreciated. I found a few similar solutions from my search but nothing which would achieve what i'd like.